The Enhancing Effect of <i>α</i>–FeOOH on Ni Surfaces Toward Electrolytic Water Splitting

For decades Ni has been known as an electrocatalyst for the oxygen evolution reaction (OER), however, crucial role that Fe plays in enhancing electrocatalytic activity of still requires deeper investigation and understanding. In this work, we shed some light on by studying structural different Ni-based electrocatalysts upon electrolytic addition quantities Fe. Colloidal NiO, well Ni, NiO NiNiO nanoparticles were synthesized electrochemically characterised Fe-free Fe-doped KOH electrolyte. Voltammetry in-situ Raman spectroscopy show higher concentrations electrolyte leads to lower OER overpotentials due presence α–FeOOH. This article is protected copyright. All rights reserved.